This part is a kind of semiconductor called BD238.

Function of this product has Medium Power Linear and Switching.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

BD234/236/238 BD234/236/238 Medium Power Linear and Switching Applications • Complement to BD 233/235/237 respectively 1 TO-126 2.Collector 3.Base 1. Emitter PNP Epitaxial Silicon Transistor Absolute Maximum Ratings TC=25°C unless otherwise noted Symbol VCBO Parameter Collector-Base Voltage : BD234 : BD236 : BD238 VCEO Collector-Emitter Voltage : BD234 : BD236 : BD238 Collector-Emitter Voltage : BD234 : BD236 : BD238 Emitter-Base Voltage Collector Current (DC) *Collector Current (Pulse) Collector Dissipation (TC=25°C) Junction Temperature Storage Temperature - 45 - 60 - 100 - 45 - 60 - 80 - 45 - 60 - 100 -5 -2 -6 25 150 - 65 ~ 150 V V V V V V V V V V A A W °C °C Value Units VCER VEBO IC ICP PC TJ TSTG Electrical Characteristics TC=25°C unless otherwise noted Symbol VCEO(sus) [ ... ]

BD238 PDF Datasheet Download